Add TexEnv PICA register offsets

include/PICA/regs.hpp

@@ -17,6 +17,24 @@ namespace PICA {
 			DepthmapEnable = 0x6D,
 			TexUnitCfg = 0x80,
 
+			// clang-format off
+			#define defineTexEnv(index, offset)   \
+			TexEnv##index##Source   = offset + 0, \
+			TexEnv##index##Operand  = offset + 1, \
+			TexEnv##index##Combiner = offset + 2, \
+			TexEnv##index##Color    = offset + 3, \
+			TexEnv##index##Scale    = offset + 4,
+
+			defineTexEnv(0, 0xC0)
+			defineTexEnv(1, 0xC8)
+			defineTexEnv(2, 0xD0)
+			defineTexEnv(3, 0xD8)
+			defineTexEnv(4, 0xF0)
+			defineTexEnv(5, 0xF8)
+
+			#undef defineTexEnv
+			// clang-format on
+
 			// Framebuffer registers
 			ColourOperation = 0x100,
 			BlendFunc = 0x101,